Self-guiding welding strip indenter, self-guiding welding strip righting mechanism, series welding head and series welding machine

Abstract

Provided are a self-guiding welding strip indenter and a self-guiding welding strip righting mechanism, and one end of the self-guiding welding strip indenter is made into a groove. When a cell and a circular-arc welding strip are arranged at the welding station of the series welding machine, the self-guiding welding strip righting mechanism is driven by the series welding head to move downward, and the self-guiding welding strip indenter comes into contact with the circular-arc welding strip which is moved toward the center of the groove along the slant wall of the groove. The indenter groove produces contact force to the circular-arc welding strip so that the circular-arc welding strip is righted to the indenter groove, and the indenter groove center is aligned to the main grid line of the cell. Therefore, the circular-arc welding strip is righted to the main grid line of the cell, and the self-guiding welding strip indenter is not in contact with the cell, but only presses the circular-arc welding strip downward and can come into contact with the main grid line of the cell tightly, thereby effectively ensuring the welding quality and efficiency of connection between the circular-arc welding strip and the cell.

Description

technical field [0001] The invention relates to the technical field of battery sheet welding, in particular to a self-guiding ribbon pressing needle and self-guiding ribbon straightening mechanism, a stringing head and a stringing machine. Background technique [0002] Since the development of the photovoltaic industry, with the changes in component prices and market demand, it has been found that the consumption of silver paste for dense-grid crystalline silicon solar cells is higher than that of the three-gate, four-gate and five-gate crystalline silicon solar cells currently on the market. The consumption of slurry is reduced by 30% to 50%, and the test proves that the dense grid module can increase the power of the module by 2.5% to 3.5%. Dense-grid crystalline silicon solar cells refer to solar cells with more than 6 but less than 32 busbar lines on a 156mm×156mm solar cell. [0003] However, in the module manufacturing process, due to the large number and dense grid l...

AI Technical Summary

Problems solved by technology

At present, the welding ribbons widely used in the market are flat welding ribbons. The welding ribbons can be positioned better by using the flat contact indenter, but the arc-shaped welding ribbons cannot be accurately positioned, which affects the automatic welding equipment. work quality and efficiency

[0004] In dense-grid crystalline silicon cells, flat ribbons are no longer applicable, and arc-shaped ribbons are used instead. The diameter of the arc-shaped ribbons is only about 0.4 mm, and it is easy to cause round The arc-shaped welding strip deviates from the center position, so that the arc-shaped welding strip cannot completely correspond to the main grid line of the dense grid battery, which increases the contact resistance of welding and reduces the reliability of welding. Therefore, it is urgent to make the arc-shaped welding With a device that can accurately correspond to the main grid lines of dense grid cells

[0005] In the patent with the application number CN201210473468, the ribbon pressing pin used for welding when connecting the battery sheet with the flat ribbon is disclosed. The pressing pin structure of this patent is designed based on the flat ribbon. The positioning of the arc-shaped ribbon, when the indenter is in contact with the arc-shaped ribbon, there is an easy misalignment between the indenter and the arc-shaped ribbon, which causes the arc-shaped ribbon to deviate and cannot be directly aligned with the busbar The problem

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